Jobs at Rakuten Group, Inc.

Supports enterprise information security governance, risk, and compliance across security, privacy, data, AI, regulatory, and assurance functions. Responsibilities include developing controls and policies, mapping ISO and regulatory requirements, coordinating audits and evidence, managing exceptions and remediation, supporting ISMS and ISMAP readiness, enabling governance automation, coaching stakeholders, and reporting risk metrics. The role also contributes to responsible AI governance, data governance, awareness initiatives, incident-response governance, and continuous improvement.

Provide L2/L3 troubleshooting and operational support for 5G Core (5GC) and cloud-native core network services. Resolve multi-vendor core and cloud infrastructure issues, perform audits and KPI analysis, implement improvements, execute configuration changes, maintain documentation and knowledge base, and participate in on-call rotations to meet SLAs.

Provide L2/L3 troubleshooting and operations for 5G Core (5GC) and virtualized core elements. Support multi-vendor packet core products, container-based infrastructure, vendor escalations, audits, KPI analysis, change implementation, incident leadership, and documentation. Collaborate with partners and internal teams, participate in on-call rotation, and support night/weekend maintenance. Work from Tokyo office.

Develop satellite communication services by surveying and constructing LEO satellite ground stations, handling radio station license applications and inspections, and planning and managing satellite communication verification tests. The role coordinates with satellite operators and telecommunications vendors and may involve procurement, operations, import/export procedures, logistics, and regulatory compliance. Required qualifications include practical satellite communication experience, a radio operator qualification, and a regular driver’s license.

Maintain, configure, troubleshoot, and expand backhaul satellite lines; coordinate with satellite carriers and telecommunications vendors; deliver VSAT installation training; plan and manage satellite communication validation tests; construct LEO satellite earth stations; and handle radio station licensing applications.

Lead proactive, hypothesis-driven threat hunts across endpoint, network, and cloud environments; research adversary TTPs (MITRE ATT&CK); develop detections, automate analyses with scripting and ML/LLMs; collaborate with detection engineering, SOC, CTI, and IR teams; perform deep technical forensics and telecommunication-specific threat analysis to improve detection and response.

Lead formation, negotiation, funding applications, and management of government-funded R&D projects. Coordinate with global sales, ministries, and financial institutions; prepare and submit reports during and after project execution.

Manage accounting and financial compliance for government‑funded R&D projects: bookkeeping, expense verification, fund monitoring, budget vs. actual reporting, asset management, and audit responses for ministries and external auditors.

Manage accounting and financial compliance for government-funded R&D projects: bookkeeping, expense verification, budget vs. actual tracking, asset management, fund monitoring, and audit responses while coordinating with internal and external stakeholders.

Mid-career recruiter responsible for end-to-end hiring for Rakuten Mobile/Total Solutions/Symphony: gathering hiring needs, creating job descriptions, managing KPIs, vendors and media, conducting interviews and offers, candidate follow-up, and occasional university recruiting projects. May cover both business and engineering roles and could move into HR management.

Lead structuring, proposal, budgeting, compliance, and management of government-funded R&D projects. Negotiate with ministries and government-affiliated finance institutions, coordinate with global sales and stakeholders, manage budgets, risks, audits, and reporting for project implementation and closeout.

Manage payroll calculations (including inhabitant tax and year-end adjustments), handle social insurance procedures, collect/manage personal identification numbers, respond to employee inquiries, manage contractors, and lead process improvements and automation projects in HR/labor affairs.

Lead end-to-end new business initiatives for a telco digital strategy team: market and competitive analysis, TAM/SAM/SOM sizing, business case and financial modeling, partnership structuring and negotiation support, project delivery, KPI definition, executive presentations, and mentoring junior analysts.

Lead end-to-end contact center and customer support transformation: assess operations and CX metrics, define future-state operating models, recommend AI/automation technologies, translate business needs into technical specifications, run stakeholder workshops, build business cases, and oversee phased implementation of omni-channel, AI-enabled support solutions.